/*
 * Copyright (c) 2007-2012, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 1999-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id: XMLStringFactoryImpl.java,v 1.2.4.1 2005/09/10 17:44:29 jeffsuttor Exp $
 */
package com.sun.org.apache.xpath.internal.objects;

import com.sun.org.apache.xml.internal.utils.FastStringBuffer;
import com.sun.org.apache.xml.internal.utils.XMLString;
import com.sun.org.apache.xml.internal.utils.XMLStringFactory;

/**
 * Class XMLStringFactoryImpl creates XString versions of XMLStrings.
 * @xsl.usage internal
 */
public class XMLStringFactoryImpl extends XMLStringFactory {
    /** The XMLStringFactory to pass to DTM construction.   */
    private static XMLStringFactory m_xstringfactory = new XMLStringFactoryImpl();

    /**
     * Get the XMLStringFactory to pass to DTM construction.
     *
     *
     * @return A never-null static reference to a String factory.
     */
    public static XMLStringFactory getFactory() {
        return m_xstringfactory;
    }

    /**
     * Create a new XMLString from a Java string.
     *
     *
     * @param string Java String reference, which must be non-null.
     *
     * @return An XMLString object that wraps the String reference.
     */
    public XMLString newstr(String string) {
        return new XString(string);
    }

    /**
     * Create a XMLString from a FastStringBuffer.
     *
     *
     * @param fsb FastStringBuffer reference, which must be non-null.
     * @param start The start position in the array.
     * @param length The number of characters to read from the array.
     *
     * @return An XMLString object that wraps the FastStringBuffer reference.
     */
    public XMLString newstr(FastStringBuffer fsb, int start, int length) {
        return new XStringForFSB(fsb, start, length);
    }

    /**
     * Create a XMLString from a FastStringBuffer.
     *
     *
     * @param string FastStringBuffer reference, which must be non-null.
     * @param start The start position in the array.
     * @param length The number of characters to read from the array.
     *
     * @return An XMLString object that wraps the FastStringBuffer reference.
     */
    public XMLString newstr(char[] string, int start, int length) {
        return new XStringForChars(string, start, length);
    }

    /**
     * Get a cheap representation of an empty string.
     *
     * @return An non-null reference to an XMLString that represents "".
     */
    public XMLString emptystr() {
        return XString.EMPTYSTRING;
    }

}
